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24. If energay of the 1st Bohy orbit is - 2.18 × 10-18g, atom!, then what will be the energy of 5th Bohr orbitg, a) - 2.18 x 10-18 J, atoml, b) + 2.18 * 108 J. atom?l, c) - 8.72x 120 J. atom' d) + 8.72 x10-20 J. atom!, 25, The number of unpaied electron in CT atom is, C) 3, 24, a) 5, b) 4, d) 6, 26. The mass of an, eleetron is, ' a) 9.1 x 1028, -24., e) o d) li67 x 10, kg b) 9.1 x 1ö28, 27. The eaample of an îsostar of N20 molecule îs, a) cO2, b) Co, e) NO2, d) NO, 1evel, 28. Tolal number og orbitalof an atam at 4th energy le, îs, a) 4, b) 8, c) 16, d) 32, 29, Bohr atomic model, Cam explain, a) The speetrum of 'H' atom only,, b) speetrum f an atom or Pon Containing onceleetrom, ) speetrum of hydrogen, the solar speetrum,, erly, molecule ,, d), In the ground state an element has 18 eleetrons in, its 'M'- shell, The element is-, 30., o) fe, b) Ni, d) cu, CY